Door lock

ABSTRACT

1,021,837. Latch fastenings. WARTSILAYHTYMA OY WARTSILA-KONCERNEN A.B. Dec. 19, 1962 [Dec. 19, 1961], No. 47875/62. Heading E2A. A latch mechanism for mounting on the inside surface of a door of a building and adapted to be operated from outside the door by a cylinder lock and to coact with a toothed keeper fastened to the door frame, comprises a base member 1 and a handle 12 adapted to be mounted on the inside surface of the door, a gear bolt 2 and a ratchet wheel 4 mounted on a common spindle 3 rotatable in a bearing 5 carried by the base member, a ratchet pawl 6 and a spring 9&lt;SP&gt;1&lt;/SP&gt; acting on the pawl both carried by the base member, a push button 13 carried by the handle and a cylinder lock in the push button having a stem 16 carrying a part 17 which when the push button is pushed down rotates the pawl so that it releases the ratchet wheel and bolt for free rotation. In the construction shown, a cover 10 is fastened to the base member 1 to cover the mechanism and in the cover is a socket which receives a head 11 of the handle so that the handle can be positioned as desired relative to the cover. The stem 16 of the cylinder lock in the push button carries a pin 20 which in the unlocked position of this lock is movable by depression of the push button through an opening 21 in the base 15 of the handle head 11 but which when the lock is rotated to locked position abuts one side or other of the base 15 of the head 11 so that the push button is either held in its normal position in which case the bolt cannot be released or it is held depressed in which case the pawl is out of contact with the ratchet wheel and the bolt is free to rotate. A sliding catch member 19 is also provided on the handle which is engageable with the push button to hold it depressed. A cam 22&lt;SP&gt;1&lt;/SP&gt; is rotatably mounted on the base member 1 and this has an aperture for connection to the stem of the cylinder lock mounted on the outside of the door so that rotation of this cylinder lock rotates the cam and since the cam engages the pawl it frees the pawl from the ratchet wheel to allow the door to be opened from the outside. The keeper, Fig. 5, comprises a rack 24 carried by a frame 23. The frame has a base portion and two arms 28 which are connected to the base portions at one end only so that the rack 24 can be clamped between the arms and the base portion by screws 31. This enables the position of the rack to be adjusted.

I. V. SINERVO DOOR LOCK April 27, 1965 2 Sheets-Sheet 1 Filed Dec. 18,1962 I. V. SINERVO April 27;;1965

DOOR LOCK Filed Dec: 18, 1962 2 Sheets-Sheet 2 FIG. 8

FIG. 5

United States Patent 3,180,120 DOOR LOCK Into Viljo Sinervo, Helsinki,Finland, assignor to Wartsilayhtyma Oy-Wartsila-koncernen Ab, Helsinki,Finland Filed Dec. 18, 1962, Ser. No. 245,531 Claims priority,application Finland, Dec. 19, 1961, 2,241 61 6 Claims. (Cl. 70-135) Theinvention relates to door locks of the rotary bolt type combined withcylinder locks and to latch mechanisms therefor. More particularly theinvention relates to a lock for doors and the like, comprising acogwheel or pinion which is rotatable about an axis aligned with theplane of the door and a mating keeper formed as a toothed rack withwhich the cogwheel meshes. The toothed rack is mounted on the frame ofthe door. The lock housing is provided with means for allowing thecogwheel to run along the toothed rack in the closing direction of thedoor and for preventing the cogwheel from rotating in the oppositedirection. The lock further includes means for releasing the cogwheelfrom its barred position.

Heretofore known locks functioning in accordance with the above statedprinciple are used for the locking of doors in a motor car. In locksused in car doors, the parts functioning as locking and unlocking meansare comparatively complicated since the real lock device must be fittedinside the door edge. Furthermore the devices for opening the door bothfrom outside and inside must be mounted separately, in the external andinternal faces of the door. Accordingly, such a lock with its openingdevices cannot be made as a single, unitary structure.

An object of the present invention is to improve on such locks andprovide ordinary door locks, mainly for use in apartment doors. Inparticular, according to the invention the latch used in ordinary doorlocks is replaced by a cogwheel. There accrues therefrom several notableadvantages. For example there is avoided the fairly complicatedconstruction which is necessary for changing the turning motion of thekey of the turning screw in conventional latch looks into the back andforth linear motion of the latch. Further, there is no necessity for thedoor to be fully closed, because the door is locked as soon as one ofthe teeth in the cogwheel engages a respective part of the toothed rackon the door frame. This is of importance especially when the door hasbeen carelessly pushed or pulled shut by children, for example, enteringor leaving the room. Since the lock has no turning knob, the same cannotbe opened, for example, by means of a strap through the opening underthe letter-flap or through some such similar aperture. Neither is itpossible to open the lock with a pick or similar object through anopening between the door and its frame.

The lock according to the present invention is mainly characterized inthat the lock housing, which is mounted on the inside plane of the door,is provided with a press or push button arranged to operate togetherwith a pivotally mounted locking arm acting in cooperation with a latchwheel which operates together with the cogwheel of the lock in such away that the press button while being pressed releases the locking armfrom its engagement with the latch wheel and thus also releases thecogwheel in the lock.

According to the above invention there can be produced a lock of verysimple construction since all of its latching and releasing elements arecentralized in the lock housing. There is thus provided a unitaryconstruction without any extra opening and transmitting elements. Bythis means the lock according to the invention is most reliable and canin a most easy manner be mounted in place as one combined unit.

According to another embodiment of the invention the look furtherincludes a pin which is secured to the axle in the lock housing which isarranged to cooperate with a stop in such manner that when a pressbutton is brought to its outward limit position, the axle pin is turnedover the top of the stop. Accordingly, the pressing in of the pressbutton is prevented. This renders it possible to prevent opening of thelock from inside.

According to still another embodiment of the invention the lock ischaracterized in that the pin, secured to the axle, and the stop in thelock housing are further arranged so that in locking the pressing actionwhile the press button is in its pushed-in position, the pin is turnedto move under the stop, thus preventing the button from moving up. Thisagain renders it possible to set the look into a continuous openposition, by which means the door is kept unlocked.

The invention is more fully described in the following specificationwith reference to the accompanying drawings illustrating one of theembodiments of the invention. In the drawings:

FIGURE 1 shows a section ofa lock housing for mounting on the inner sideof the door;

FIGURE 2 shows a top view of the lock housing according to FIGURE 1;

FIGURE 3 shows an end view of the lock housing of FIGURE 1;

FIGURE 4 shows a section of the counter part for mounting on a doorframe;

FIGURE 5 shows a front view of the counter part;

FIGURE 6 shows a side view of the base plate of the lock housing withits mounted parts;

FIGURE 7 shows a top view of the base plate with its mounted parts; and

FIGURE 8 shows an end view of the base plate with its mounted parts.

The construction of the lock according to the drawings is defined asfollows:

To one of the bent sides of the L-shaped base plate 1, which is to befastened to the inner side of the door, is secured a bearing 5. Mountedon hearing 5 is a freely turnable axle pin 3 whose axis is in line Withthe other bent side of the base plate 1. To one of the ends of the axlepin 3 is fastened a pinion or cogwheel 2 and to its opposite endlikewise a ratchet wheel 4. The pawl or locking arm 6 which limits theturning motion of the ratchet wheel 4 is fastened from its other end bymeans of a pin 9. Pin 9 is secured vertically to the flange of the baseplate 1 in such a way that the locking arm 6 can rotate about pin 9 inline with the plane of the base plate 1. The opposite end of locking arm6 is provided with an extending locking part 7, which engages the teethof ratchet wheel 4 under the influence of spring 9'. The teeth of theratchet wheel 4 are formed so that while the cogwheel 2 is turning theratchet wheel 4 in one direction (counterclockwise in FIGURE 3), itscogs can urge the locking part 7 to the side, thus enabling the ratchetwheel 4 to turn in the same direction. However, when the ratchet wheel 4is turned in the opposite direction, the cogs press against the lockingpart 7 Without moving it to the side. Thus the ratchet wheel 4 isprevented from turning. The pawl or locking arm 6 is further providedwith a lug 8, extending to the central part of the base plate 1, theaction of which is described later.

To the lock housing 10, covering the base plate 1 and the mounted parts,is pivoted a handle 12. The other end of handle 12 is formed as aguiding housing 11 which allows the handle to be turned parallelly withthe plane of the base plate 1. Mounted on the housing 11 is a pushbutton 13. Button 13 can move vertically against the base plate 1 but isstopped from turning relative the handle 12 by means of a tongue andgroove arrangement 14. The push button 13 is provided with an axle pin W9 1s, mounted inside the lock housing 16 so that it protrudes through anopening in plate 15 located on the bottom of the housing 11. Aconicalpart 17 is secured to the end of the axle-pin 16. Between the pushbutton 13 and plate 15 is fitted a pressure spring 18, which keeps thebutton 13 in its outward position. The pushing part 17 limits itsoutward projection range. The pushing part 17 of the push button 13 andthe lug 3 of the locking arm 6 act together so that when the push button13 is pushed in, its pushing part 17 contacts the pushing lever, andwhen the push button 13 is pressed further in, the pushing part 17 willslide along the surface of the pushing lever, thus pushing the leveraway from its track. This action causes the locking arm 6 to turn on itsaxis and thus release the locking part 7 from its engagement with theratchet wheel 4 which now is free. Accordingly, the cogwheel 2 can turnfreely. Since the pushing part 17 of the push button 13 has a conicalshape, the mutual action of the pushing part 17 and the pushin lever isby this means transferred to the lock handle 12 in any of its positionsrelative the lock housing 1b. In order to cause the push button 13 toremain in its pressed-imposition,

the lock handle 12 is provided with a sliding catch 1), V

which can be shifted over button 13. By returning the catch 19 againinto its starting position, the button 13 is automatically returned toits outwards extended position.

According to one of the embodiments of the invention, pushing assemblyof elements 13, 16, 17 is formed into a cylinder-lock in which the pushbutton 13 forms the non-rotatable part of the key-housing and the axlepin 16 and the pushing part 17, together with a locking mechanism, formsthe movable part of the key housing. To the axle pin 16 is secured alocking pin 2%) which extends from axle pin 16, such that the same liesdirectly atop plate 15 located on the bottom of housing 11, when thepush button 13 is in its outward extending position. The plate15 isprovided with a slot 21, through which, after the button 13 is pressed,the pin 20 can move to the opposite side of' the plate 15 such that itlies underneath the plate 15. When the key (not shown) is turned in itshousing, the axle pin 16 turns relative the push button 13, at whichmoment, while the push button 13 is not depressed, the locking-pin 26 isshifted from its position at the slot 27 on top of plate 15.Accordingly, the push button 13 cannot be depressed. However, by turningthe key in its housing while the push button 13 is in its pushed-inposition and the locking pin 20 has shifted itself through the slot 21to the bottom side of the plate 15, after which it again moves away fromits position at the slot 21 but is still under the plate 15' while thepush button 13 is depressed, the latter cannot be pushed out. Thepushing part 17 now keeps the locking arm 6 out of engagement with theratchet wheel 4. When releasing the push button 13 with the key, thelocking pin Zii'is shifted to its normal position at the slot 21.

A complete door lock comprises a conventional cylindrical lockmechanism, which is to be fastened to the outer side of the door, by aidof which the door lock can be opened with a key. Accordingly, there ispivotably mounted to the housing a transmitting member 22 which isturnable in line with the plane of the base plate 1. In the central partof the transmitting member 22 is a slit for engaging the end of theso-called turning-iron. The transmitting member 22 is provided with acam 22 which operates in cooperation with the locking arm 6 so that whenthe cam 22' is turned by means of the turning-iron and the key, cam 22is brought into contact with the locking arm 6, and while the turningmotion of the transmitting member 22 continues, the cam 22'releases thearm 6 from its engagement with ratchet wheel 4 so that ratchet wheel 4and cogwheel 2 can turn freely. When the key is turned back again in thecylindrical lock device, the cam 22 returns to its starting point andlikewise locking arm 6.

The keeper of the door lock, which is to be mounted 4, on the doorframe, is shown in FIGURES 4 and 5. The keeper comprises two parts,viz., the frame 23 and the toothed rack 24. The frarrie 23 is sunk intothe frame of the door and fastened to it by screws passed through theholes 25. The frame 23 of the keeper is rectangular and a portion aroundits centre is hollowed out to provide space for rack 24. Both sides ofthe frame 23 in the keeper have slits 27 which engage two tongues 28,one on each side of the frame. The tongues 28 are fastened to the frame23 only from one of their ends. The rack 24 consists of a U-shaped partfitted in the frame 23 and includes teeth 29. The edge of the U-shapedpart has a notch 3%, through which passes a screw 31 by which it isfastened to the frame. The notch is of a size which allows shifting ofthe rack 24 somewhat towards either of the sides of the frame 23 ortowards its base part.

When the. lock housing and its keeper are mounted on the door, thecogwheel 2 engages the rack 24 in closing the door. Since the ratchetwheel 6 is locked by means of the locking arm 6, the cogwheel 2 ispermitted to turn along the rack 2% only in the closing direction of thedoor,'but the wheel cannot turn in the opposite direction. Bydisengaging the locking arm 6 from its grip with the ratchet wheel 4 inthe above stated manner, the cogwheel 2 is permitted to turn also in theoppositedirection, in which case the door can be opened.

The drawings and the specification relative to these are of course onlyintended as an illustration of the invention. The different details ofthe lock may thus vary quite considerably within the limits of theinventive idea. Thus, it is not important that the acting direction ofthe press button is exactly vertical to the fastening plane of the baseplate, as the same may even be placed at an angle which renders the bestpossible engaging grip between the lock handle and the push button. Eventhe push button need not be constructed so that the locking is performedwith a key, and in such case it need not be provided with any lockingmechanism.

What I claim is:

l. A door lock comprising a rotary bolt including 'a pinion at one endof said bolt and a ratchet wheel at the other end of said bolt, a keeperincluding a toothed rack for engagement by said pinion, a pivotablymounted pawl for engaging said ratchet wheel when said pawl is in afirst position and clearing said ratchet wheel when said pawl is in asecond position, spring means for urging said pawl to said firstposition, a press button, an axle extending from said press button forengaging said pawl and moving the latter to said second position whensaid press button is depressed, a slotted plate disposed about saidaxle, a pin in said axle, said pin being normally opposite the slot insaid plate, and means for rotating said axle so that when said axle isrotated prior to depression of said press button said pin moves fromopposite said slot blocking the depression of said press button and saidpawl remains in said first position and when said axle is rotated whilesaid press button is depressed said pin passes through said slot andmoves from opposite the latter and said pawl is locked in said secondposition.

2. For use with a door and door post, a door latch comprising a rack insaid door post, a housing secured to said door, a first axle journaledin said housing, a toothed wheel secured to one end of said axle forengaging said rack, a ratchet wheel secured to the other end of saidaxle, a spring biased pawl for engaging said ratchet wheel, a camrotatably mounted in the housing for moving said pawl out of engagementwith said ratchet wheel and adapted to be rotated by a first cylinderlook, a handle including a hub rotatably mounted on said housing, apress button slidably mounted in said hub and restrained from rotationalmovement, spring means for biasing said press button against depression,a second axle extending from said press button for contacting said pawlto disengage the latter from said ratchet wheel when said press buttonis depressed.

3. The latch of claim 2 wherein the end of said second axle extendingfrom said press button is conical and a portion of said pawl has asloped surface for contacting said conical end.

4. The latch of claim 2 wherein said press button includes a recess foraccommodating a lock cylinder.

5. The latch of claim 2 wherein said press button includes a rotarymeans in said recess, said second axle extending from said rotary meansand rotatably movable thereby, a pin extending from said second axle andan apertured and slotted plate disposed in said housing about saidsecond axle with said pin opposite the slot to permit said pin to passthrough said slot only when said second axle is in a first rotationalposition and said press button 1 is depressed so that when said secondaxle is rotated to a second rotational position before the depression ofsaid press button said second axle is blocked from engaging 6 said pawland when said second axle is rotated to said second rotational positionwhen said press button is depressed said second axle is maintained inengagement with said pawl.

6. The latching means of claim 5 wherein said rotary means is a lockcylinder.

References (Zited by the Examiner UNITED STATES PATENTS 531,310 12/94Hansen. 1,161,477 11/15 Horton. 1,184,498 5/ 16 Wells. 1,198,341 9/16Geery. 1,326,193 12/ 19 Harden 292280 2,363,854 11/44 Bierenfeld.2,629,621 2/53 Roethel 292-341.12 2,924,087 2/60 Wartian 292-480 X 3 M.HENSON WOOD, IR., Primary Examiner.

1. A DOOR LOCK COMPRISING A ROTARY BOLT INCLUDING A PINION AT ONE END OFSAID BOLT AND A RATCHET WHEEL AT THE OTHER END OF SAID BOLT, A KEEPERINCLUDING A TOOTHED RACK FOR ENGAGEMENT BY SAID PINION, A PIVOTABLYMOUNTED PAWL FOR ENGAGING SAID RATCHET WHEEL WHEN SAID PAWL IS IN AFIRST POSITION AND CLEARNING SAID RATCHET WHEEL WHEN SAID PAWL IS IN ASECOND POSITION, SPRING MEANS FOR URGING SAID PAWL TO SAID FIRSTPOSITION, A PRESS BUTTON, AN AXLE EXTENDING FROM SAID PRESS BUTTON FORENGAGING SAID PAWL AND MOVING THE LATTER TO SAID SECOND POSITION WHENSAID PRESS BUTTON IS DEPRESSED, A SLOTTED PLATE DISPOSED ABOUT SAIDAXLE, A PIN IN SAID AXLE, SAID PIN BEING NORMALLY OPPOSITE THE SLOT INSAID PLATE, AND MEANS FOR ROTATING SAID AXLE SO THAT WHEN SAID AXLE ISROTATED PRIOR TO DEPRESSION OF SAID PRESS BUTTON SAID PIN MOVES FROMOPPOSITE SAID SLOT BLOCKING THE DEPRESSION OF SAID PRESS BUTTON AND SAIDPAWL REMAINS THE SAID FIRST POSITION AND WHEN SAID AXLE IS ROTATED WHILESAID PRESS BUTTON IS DEPRESSED SAID PIN PASSES THROUGH SAID SLOT ANDMOVES FROM OPPOSITE THE LATTER AND SAID PAWL IS LOCKED IN SAID SECONDPOSITION.